A new biography of Grace Kelly starring Nicole Kidman has been called 'pure fiction' by the late princess's children.
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Prince Albert of Monaco and his sisters have denounced a new biographical film starring Nicole Kidman as their mother Grace Kelly as "glamourised" and "pure fiction."

In a statement, Prince Albert II and Princesses Caroline and Stephanie said the film's script did not accurately portray events involving their mother, the Hollywood actress who married Monaco's Prince Rainier III in 1956.

"It tells a story, rewritten and unnecessarily glamourised... containing significant historical inaccuracies and a series of purely fictional scenes," the royals said in a statement.

The statement said the royal family had been granted access to the script and requested several changes, but the requests were not taken into account.

Grace of Monaco, directed by France's Olivier Dahan, will feature Kidman and British actor Tim Roth as Prince Rainier.

It focuses on a six-month period in 1962 when Monaco was in a heated tax dispute with France and Alfred Hitchcock offered Kelly a chance to return to acting.

Filming of the new movie took place between September and December in Monaco, southern France and Italy.

The film's producer, Pierre-Ange Le Pogam, told AFP the production was meant to be a work of fiction and confirmed the royal family had been consulted.

"The palace was aware of the script and made requests for changes. We took most of their remarks into account, but not all," he said.

"The film is not intended to tell the true story of the principality," he said.